Evaporator of air conditioning system, air conditioning system, control method and controller

Abstract

The invention relates to the field of refrigeration equipment, in particular to an evaporator of an air conditioning system, the air conditioning system, a control method and a controller. An evaporator of the air conditioning system comprises a first refrigerant pipeline, a second refrigerant pipeline and a heating assembly, an inlet of the first refrigerant pipeline serves as a refrigerant inlet of the evaporator, and the inlet of the first refrigerant pipeline serves as an outlet of the first refrigerant pipeline; an inlet of the second refrigerant pipeline is connected with an outlet of the first refrigerant pipeline, and an outlet of the second refrigerant pipeline serves as a refrigerant outlet of the evaporator; the heating assembly is arranged at an outlet of the second refrigerant pipeline. The outlet of the second refrigerant pipeline is formed in the position lower than the inlet of the first refrigerant pipeline, so that the second refrigerant pipeline is effectively prevented from being blocked by the bottom of the shell, and the heat exchange effect at the refrigerant inlet of the evaporator is improved; the heating assembly is arranged at the outlet of the second refrigerant pipeline, so that heat exchange of refrigerants at the refrigerant outlet of the evaporator is more sufficient, the amount of liquid refrigerants in the refrigerant pipelines is reduced, and the heat exchange effect of the air conditioning system is improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration equipment, and in particular to an evaporator of an air-conditioning system, an air-conditioning system, a control method and a controller. Background Art

[0002] In the related art, when the air-conditioning system is in operation, due to the complexity of the temperature and humidity of the indoor and outdoor environments and the multiple coupling effects of the instability of the indoor return air field, it is difficult for the evaporator to maintain a good heat exchange effect for the refrigerant in each section of the regional flow path under a complex environment. In addition, the refrigerant inlet of the evaporator is set at the bottom of the shell of the device where the evaporator is located, which is easily blocked by the bottom of the shell or the water tray, resulting in poor heat exchange effect in some regional flow paths, and uneven heat exchange in the regional flow paths, resulting in low utilization of the evaporator, which may also lead to excessive liquid in the refrigerant circuit. In severe cases, liquid hammer may occur, affecting the performance of the air-conditioning system. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the embodiments of the present application provide an evaporator of an air-conditioning system, an air-conditioning system, a control method and a controller, which are conducive to reducing the liquid refrigerant at the refrigerant outlet of the evaporator, preventing liquid hammer, and at the same time increasing the amount of gaseous refrigerant entering the compressor, thereby improving the heat exchange effect of the air-conditioning system, thereby improving the energy efficiency of the air-conditioning system.

[0004] In a first aspect, an embodiment of the present application provides an evaporator of an air conditioning system, characterized in that it includes:

[0005] a first refrigerant pipeline, wherein an inlet of the first refrigerant pipeline serves as a refrigerant inlet of the evaporator, and the inlet of the first refrigerant pipeline is lower than an outlet of the first refrigerant pipeline;

[0006] a second refrigerant pipe, wherein the inlet of the second refrigerant pipe is connected to the outlet of the first refrigerant pipe, the outlet of the second refrigerant pipe serves as the refrigerant outlet of the evaporator, and the outlet of the second refrigerant pipe is lower than the inlet of the first refrigerant pipe;

[0007] A heating component is arranged at the outlet of the second refrigerant pipeline.

[0008] The technical solution of the above-mentioned first aspect of the present application has at least one of the following advantages or beneficial effects: the outlet of the second refrigerant pipe is arranged at a position lower than the inlet of the first refrigerant pipe, so that the position of the inlet of the first refrigerant pipe is raised, effectively avoiding being blocked by the bottom of the shell or the water receiving tray, thereby improving the heat exchange effect at the refrigerant inlet of the evaporator; since the outlet of the second refrigerant pipe is close to the bottom of the shell, the heating component is arranged at the outlet of the second refrigerant pipe, and through the cooperation of the heating component and the second refrigerant pipe, the refrigerant heat exchange at the refrigerant outlet of the evaporator is more sufficient, so that the liquid refrigerant at the refrigerant outlet of the evaporator is reduced, liquid hammer in the refrigerant pipe is avoided, and at the same time, the gaseous refrigerant entering the compressor is increased, thereby improving the heat exchange efficiency of the air-conditioning system.

[0009] According to some embodiments of the present application, the heating component includes a first pipe, an inlet of the first pipe is connected to a refrigerant outlet of the condenser, and an outlet of the first pipe is connected to an inlet of the first refrigerant pipe.

[0010] According to some embodiments of the present application, the position of the second refrigerant pipe is higher than that of the first pipe, and the outlet of the second refrigerant pipe is arranged adjacent to the first pipe.

[0011] In a second aspect, an embodiment of the present application provides an air-conditioning system, comprising a condenser, an evaporator including the first pipe as described above, and a third refrigerant pipe, wherein the third refrigerant pipe connects the refrigerant outlet of the condenser and the inlet of the first refrigerant pipe, and the third refrigerant pipe comprises at least one of the first pipes and one of the second pipes, and the second pipe and the first pipe are connected in parallel.

[0012] The technical solution of the second aspect of the present application has at least one of the following advantages or beneficial effects: the third refrigerant pipeline includes at least one first pipeline and a second pipeline, the first pipeline and the second pipeline are connected in parallel, and the air-conditioning system can determine the flow direction of the refrigerant flowing out of the refrigerant outlet of the condenser according to the current heat exchange effect of the evaporator. When the heat exchange effect of the evaporator is not good, the refrigerant is controlled to flow through the first pipeline and the second pipeline at the same time, and the refrigerant flowing through the first pipeline and the second refrigerant pipeline perform heat exchange, thereby improving the heat exchange efficiency of the air-conditioning system; when the heat exchange efficiency of the evaporator is high, the refrigerant is controlled to flow only through the second pipeline and not through the first pipeline. The air-conditioning system improves the flexible adjustability of the air-conditioning system and the heat exchange efficiency by switching the flow direction of the refrigerant according to the heat exchange effect of the evaporator.

[0013] In a third aspect, an embodiment of the present application provides a control method for an air conditioning system, which is applied to the air conditioning system described in the technical solution of the second aspect, including:

[0014] Starting the air conditioning system and determining that the air conditioning system enters a stable state;

[0015] When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is less than a preset temperature threshold, the first pipeline is controlled to be conductive.

[0016] The technical solution of the third aspect of the present application has at least one of the following advantages or beneficial effects: starting the air-conditioning system and confirming that the air-conditioning system enters a stable state. When the air-conditioning system enters a stable state, the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is determined. When the temperature difference is less than a preset temperature threshold, it indicates that the heat exchange efficiency of the current evaporator is low. The first pipeline is controlled to be conductive, and the refrigerant flowing out of the refrigerant outlet of the condenser flows through the first pipeline and the second pipeline at the same time. The refrigerant flowing through the first pipeline and the second refrigerant pipeline perform heat exchange, thereby improving the heat exchange efficiency of the evaporator and improving the energy efficiency of the air-conditioning system.

[0017] According to some embodiments of the present application, the air conditioning system further includes a compressor and a throttling assembly, the outlet of the compressor is connected to the refrigerant inlet of the evaporator through the throttling assembly, and the refrigerant outlet of the evaporator is connected to the return air port of the compressor;

[0018] The step of determining that the air conditioning system enters a stable state includes:

[0019] Periodically detecting the frequency of the compressor and the opening of the throttling component;

[0020] When the frequencies of the compressors and the openings of the throttling components detected in a plurality of consecutive cycles are the same, it is determined that the air-conditioning system has entered a stable state.

[0021] According to some embodiments of the present application, the control method further includes: when the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is greater than the preset temperature threshold, controlling the first pipeline to be disconnected.

[0022] According to some embodiments of the present application, the control method further includes:

[0023] After controlling the first pipeline to be turned on, maintaining the turned-on state for a second preset time;

[0024] or,

[0025] After controlling the first pipeline to be disconnected, the disconnected state is maintained for a third preset time.

[0026] In a fourth aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor runs the computer program, the control method of the air-conditioning system as described in the technical solution of the third aspect above is executed.

[0027] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the control method of the air-conditioning system as described in the technical solution of the third aspect above.

[0028] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a structural schematic diagram of an evaporator of an air-conditioning system provided in an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of the structure of an air conditioning system provided in an embodiment of the present application;

[0031] Figure 3 is a structural schematic diagram of another air conditioning system provided in an embodiment of the present application;

[0032] Figure 4 is a structural schematic diagram of an evaporator of another air-conditioning system provided in an embodiment of the present application;

[0033] Figure 5 is a flow chart of a control method of an air conditioning system provided in an embodiment of the present application;

[0034] Figure 6 is a flow chart of a method for determining that an air conditioning system enters a stable state provided by an embodiment of the present application;

[0035] Figure 7 Another method for controlling an air conditioning system provided in an embodiment of the present application;

[0036] Figure 8 A method for controlling the conduction or disconnection of a first pipeline provided in an embodiment of the present application;

[0037] Fig. 9 It is a structural diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0039] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0041] In the related art, the air-conditioning system mainly includes an indoor heat exchanger, an outdoor heat exchanger and a compressor. When the air-conditioning system is in operation, in the cooling state, the outdoor heat exchanger acts as a condenser to condense, and the indoor heat exchanger acts as an evaporator to evaporate; when the air-conditioning is heating, the outdoor heat exchanger acts as an evaporator to evaporate, and the indoor heat exchanger acts as a condenser to condense.

[0042] Due to the complexity of indoor and outdoor environmental temperature and humidity and the multiple coupling effects of the instability of the indoor return air field, it is difficult for the evaporator to maintain a good heat exchange effect for the refrigerant in each section of the regional flow path in a complex environment. In addition, since the refrigerant inlet of the evaporator is set at the bottom of the shell of the equipment where the evaporator is located, it is easy to be blocked by the bottom of the shell or the water tray, resulting in poor heat exchange effect in the blocked regional flow path and uneven heat exchange in the regional flow path, which can easily lead to more liquid refrigerant at the refrigerant outlet of the evaporator. In severe cases, liquid hammer will occur, which will reduce the amount of gaseous refrigerant flowing from the refrigerant outlet of the evaporator back to the return air port of the compressor, affecting the performance of the air-conditioning system and the heat exchange effect of the air-conditioning system.

[0043] In order to solve the above problems, the solution in the related art is to add superheating sections to the heat exchange pipes on the evaporator side and the condenser side of the air conditioning system to improve the heat recovery utilization rate. However, this solution is a single-phase heat exchange and cannot simultaneously achieve the heat recovery effect of the evaporator and the condenser. The effect of improving the performance and heat exchange efficiency of the air conditioning system is not obvious.

[0044] Based on this, the embodiments of the present application provide an evaporator of an air-conditioning system, an air-conditioning system, a control method and a controller, which are beneficial to improving the utilization rate of the evaporator of the air-conditioning system and improving the heat exchange efficiency of the air-conditioning system, thereby improving the energy efficiency of the air-conditioning system.

[0045] Reference Figure 1 , Figure 1 It is a structural schematic diagram of an evaporator 1000 of an air-conditioning system provided in an embodiment of the present application, including a first refrigerant pipe 100, a second refrigerant pipe 200 and a heating component 300, wherein the inlet 110 of the first refrigerant pipe serves as the refrigerant inlet of the evaporator 1000, and the inlet 110 of the first refrigerant pipe is lower than the outlet 120 of the first refrigerant pipe; the inlet 210 of the second refrigerant pipe is connected to the outlet 120 of the first refrigerant pipe, and the outlet 220 of the second refrigerant pipe serves as the refrigerant outlet of the evaporator 1000, and the outlet 120 of the second refrigerant pipe is lower than the inlet 110 of the first refrigerant pipe; the heating component 300 is arranged at the outlet 220 of the second refrigerant pipe.

[0046] When the air-conditioning system is in the cooling working mode, the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor and enters the condenser. The high-temperature and high-pressure refrigerant is cooled in the condenser. The refrigerant coming out of the condenser passes through the throttling component for throttling pressure drop and then enters the evaporator 1000 through the inlet 110 of the first refrigerant pipe. The refrigerant flows from bottom to top in the first refrigerant pipe 100 and flows into the inlet 210 of the second refrigerant pipe from the outlet 120 of the first refrigerant pipe. The refrigerant flows from top to bottom in the second refrigerant pipe 200 and flows into the heating component 300 at the outlet 220 of the second refrigerant pipe. The heating component 300 and the second refrigerant pipe 200 cooperate to make the refrigerant heat exchange at the outlet of the evaporator more sufficient, reduce the liquid refrigerant at the outlet of the evaporator 1000, and avoid liquid hammer in the refrigerant pipe.

[0047] The outlet 220 of the second refrigerant pipe is arranged at a position lower than the inlet 110 of the first refrigerant pipe, so that the position of the inlet 110 of the first refrigerant pipe is raised, effectively avoiding the inlet 110 of the first refrigerant pipe from being blocked by the bottom of the shell or the water receiving tray, thereby improving the heat exchange effect at the refrigerant inlet of the evaporator 1000; since the outlet 220 of the second refrigerant pipe is close to the bottom of the shell, the heating component 300 is arranged at the outlet 220 of the second refrigerant pipe. Through the cooperation of the heating component 300 and the second refrigerant pipe 200, the refrigerant heat exchange at the refrigerant outlet of the evaporator 1000 is more sufficient, the liquid refrigerant at the refrigerant outlet of the evaporator 1000 is reduced, liquid hammer in the refrigerant pipe is avoided, and at the same time, the gaseous refrigerant entering the compressor is increased, thereby improving the heat exchange efficiency of the air-conditioning system.

[0048] In one embodiment of the present application, the heating component 300 is arranged near the bottom of the evaporator 1000, which can provide good heat exchange conditions for the regional flow paths with poor heat exchange conditions in the evaporator 1000, which is beneficial to solving the problem of uneven heat exchange in the regional flow paths, ensuring the heat exchange effect of the evaporator 1000, and improving the utilization rate of the evaporator 1000, thereby improving the energy efficiency of the air-conditioning system.

[0049] Reference Figure 2 , Figure 2 It is a schematic diagram of the structure of an air conditioning system provided by an embodiment of the present application. The air conditioning system includes an evaporator 1000, a condenser 400 and a compressor 500. The evaporator 1000 includes a first refrigerant pipe 100, a second refrigerant pipe 200 and a heating assembly 300; wherein the heating assembly 300 is a first pipe 310, the exhaust port 510 of the compressor 500 is connected to the refrigerant inlet of the condenser 400, the refrigerant outlet of the condenser 400 is connected to the inlet of the first pipe 310, and the outlet of the first pipe 310 is connected to the inlet of the first refrigerant pipe 100. The position of the second refrigerant pipe 200 is higher than that of the first pipe 310, the outlet 220 of the second refrigerant pipe is arranged adjacent to the first pipe 310, and the outlet of the second refrigerant pipe 200 is connected to the return air port 520 of the compressor 500.

[0050] The inlet of the first pipe 310 is connected to the refrigerant outlet of the condenser 400, so that the refrigerant flowing out from the refrigerant outlet of the condenser 400 flows through the first pipe 310, the inlet 210 of the second refrigerant pipe is connected to the outlet 120 of the first refrigerant pipe, and the outlet 220 of the second refrigerant pipe serves as the refrigerant outlet of the evaporator 1000, the position of the second refrigerant pipe 200 is higher than the position of the first pipe 310, and the outlet 220 of the second refrigerant pipe is arranged adjacent to the first pipe 310. Therefore, the refrigerant coming out from the outlet 220 of the second refrigerant pipe, which is also the refrigerant outlet of the evaporator 1000, can exchange heat with the refrigerant flowing out of the adjacent first pipe 310. The gas-liquid mixed refrigerant in the second refrigerant pipe 200 absorbs heat, the superheat increases, and the subcooling of the liquid refrigerant in the first pipe 310 increases. Through the cooperation between the first pipe 310 and the second refrigerant pipe 200, the refrigerant heat exchange at the refrigerant outlet of the evaporator 1000 is more sufficient, which reduces the liquid refrigerant at the refrigerant outlet of the evaporator 1000, avoids liquid hammer in the refrigerant pipe, and at the same time increases the gaseous refrigerant entering the compressor, thereby improving the heat exchange efficiency of the air-conditioning system.

[0051] It should be noted that, in one embodiment of the present application, the position of the first pipe 310 is lower than the position of the second refrigerant pipe 200, and the outlet 220 of the second refrigerant pipe is lower than the outlet 120 of the first refrigerant pipe, so that the position of the inlet of the first refrigerant pipe is raised, effectively avoiding being blocked by the bottom of the shell or the water receiving tray, and improving the heat exchange effect at the refrigerant inlet of the evaporator 1000; the first pipe 310 is arranged at a position close to the bottom of the evaporator 1000, and the refrigerant in the second refrigerant pipe 200 and the refrigerant in the first pipe 310 close to the bottom of the evaporator 1000 are heat exchanged, which is conducive to solving the problem of uneven heat exchange of regional flow paths in the evaporator 1000 and the problem of low heat exchange efficiency at the bottom of the evaporator 1000, thereby improving the utilization rate of the evaporator 1000; at the same time, the refrigerant heat exchange at the refrigerant outlet of the evaporator 1000 is made more sufficient, reducing the liquid refrigerant at the refrigerant outlet of the evaporator 1000, avoiding liquid hammer in the refrigerant pipe, and improving the safety and reliability of the air-conditioning system.

[0052] Reference Figure 3 , Figure 31 is a schematic diagram of the structure of another air conditioning system provided in an embodiment of the present application, including a first refrigerant pipeline 100, a second refrigerant pipeline 200 and a third refrigerant pipeline 320, wherein the third refrigerant pipeline 320 connects the refrigerant outlet of the condenser 400 and the inlet of the first refrigerant pipeline 100. Among them, the third refrigerant pipeline 320 includes at least one first pipeline 310 and one second pipeline 330, and the second pipeline 330 and the first pipeline 310 are connected in parallel. In the embodiment of the present application, a valve assembly 311 is provided on the first pipeline 310. The valve assembly 311 is used to control the first pipeline 310 to be in a conducting or disconnecting state. When the valve assembly 311 is opened, the first pipeline 310 is conducting; when the valve assembly 311 is closed, the first pipeline 310 is disconnected. The inlet of the first pipeline 310 is connected to the refrigerant outlet of the condenser 400, and the flow direction of the refrigerant flowing out of the condenser 400 in the third refrigerant pipeline 320 is controlled by the valve assembly 311. When the valve assembly 311 is opened, the first pipeline 310 is connected, and the refrigerant flows through the first pipeline 310 and the second pipeline 330 at the same time; when the valve assembly 311 is closed, the first pipeline 310 is disconnected, and the refrigerant can only flow through the second pipeline 330.

[0053] The third refrigerant pipeline 320 includes at least one first pipeline 310 and a second pipeline 330, and the first pipeline 310 and the second pipeline 330 are connected in parallel. The air conditioning system can determine the flow direction of the refrigerant flowing out of the refrigerant outlet of the condenser 400 according to the current heat exchange effect of the evaporator 1000. When the heat exchange effect of the evaporator 1000 is not good, the refrigerant is controlled to flow through the first pipeline and the second pipeline at the same time, and the refrigerant flowing through the first pipeline and the second refrigerant pipeline perform heat exchange, thereby improving the heat exchange efficiency of the air conditioning system; when the heat exchange efficiency of the evaporator 1000 is high, the refrigerant is controlled to flow only through the second pipeline and not through the first pipeline. The air conditioning system improves the flexible adjustability of the air conditioning system and the heat exchange efficiency by switching the flow direction of the refrigerant according to the heat exchange effect of the evaporator 1000.

[0054] In one embodiment of the present application, the first pipeline 310 is provided with a valve assembly 311, which controls the valve assembly 311 to open or close by judging whether the temperature difference between the temperature of the refrigerant inlet of the evaporator 1000 and the temperature of the refrigerant outlet of the evaporator 1000 is less than a preset temperature threshold, so as to make the first pipeline 310 conductive or disconnected. When the temperature difference between the temperature of the refrigerant inlet of the evaporator 1000 and the temperature of the refrigerant outlet of the evaporator 1000 is less than the preset temperature threshold, it indicates that the heat exchange effect of the current evaporator 1000 is not good, the valve assembly 311 is opened, the first pipe 310 is turned on, and the refrigerant flows through the first pipe 310 and the second pipe 330 at the same time. The refrigerant flowing through the first pipe 310 and the second refrigerant pipe 200 perform heat exchange, and the gas-liquid mixed refrigerant in the second refrigerant pipe 200 absorbs heat, the superheat increases, and the subcooling of the liquid refrigerant in the first pipe 310 increases, so that the refrigerant heat exchange at the refrigerant outlet of the evaporator 1000 is more sufficient, the liquid refrigerant at the refrigerant outlet of the evaporator 1000 is reduced, and liquid hammer in the refrigerant pipe is avoided. At the same time, the gaseous refrigerant entering the compressor 500 is increased, thereby improving the heat exchange efficiency of the air-conditioning system and the energy efficiency of the air-conditioning system. When the temperature difference between the temperature of the refrigerant inlet of the evaporator 1000 and the temperature of the refrigerant outlet of the evaporator 1000 is greater than the preset temperature threshold, it indicates that the current heat exchange efficiency of the evaporator 1000 is high, and there is no need to perform heat exchange through the refrigerant flowing through the first pipe 310 and the refrigerant flowing through the second refrigerant pipe 200 to improve the heat exchange efficiency of the evaporator 1000. At this time, the valve assembly 311 is closed and the first pipe 310 is disconnected.

[0055] The valve assembly 311 is arranged in the first pipe 310, which can flexibly adjust the flow direction of the refrigerant flowing out of the refrigerant outlet of the condenser 400 according to the heat exchange efficiency of the evaporator 1000. When the heat exchange efficiency is low, the valve assembly 311 is opened, the first pipe 310 is connected, and the refrigerant flowing out of the refrigerant outlet of the condenser 400 flows to the first pipe 310, which can improve the utilization rate of the evaporator 1000 and the heat exchange efficiency, while also improving the flexibility of the air-conditioning system.

[0056] In one embodiment of the present application, the air-conditioning system is further provided with a detection module, the detection module includes a first temperature detection module and a second temperature detection module, the first detection module is arranged at the inlet of the evaporator 1000, and is used to detect the temperature of the refrigerant at the inlet of the evaporator 1000, and the second detection module is arranged at the outlet of the second refrigerant pipe, and is used to detect the temperature of the refrigerant at the outlet of the second refrigerant pipe. In one embodiment of the present application, the outlet of the second refrigerant pipe serves as the outlet of the evaporator 1000. By setting the first temperature module and the second temperature module, it is possible to determine whether the temperature difference between the temperature of the refrigerant inlet of the evaporator 1000 and the temperature of the refrigerant outlet of the evaporator 1000 is less than a preset temperature threshold, thereby determining the current heat exchange efficiency and heat exchange effect of the evaporator 1000, and controlling the switching state of the valve assembly 311 according to the current heat exchange efficiency and heat exchange effect of the evaporator 1000.

[0057] It should be noted that, in one embodiment of the present application, the valve assembly 311 is a solenoid valve, which is an industrial device controlled by electromagnetics and used to control the direction, flow rate and speed of the refrigerant fluid. In one embodiment of the present application, the on / off state of the first pipeline 310 is controlled by controlling the on / off state of the solenoid valve.

[0058] It should be noted that the valve component 311 in one embodiment of the present application is a solenoid valve, and can also be one or more of a directional control valve, a thermal expansion valve, a three-way valve, a stop valve and a butterfly valve. Those skilled in the art can select an appropriate valve component 311 according to actual conditions, and the embodiment of the present application does not limit the type of the valve component 311.

[0059] Reference Figure 4 , Figure 4It is a structural schematic diagram of an evaporator 1000 of another air-conditioning system provided in an embodiment of the present application, including a first refrigerant pipe 100, a second refrigerant pipe 200 and a heating assembly 300, and also including a water collecting device 600 and a throttling assembly (not shown in the figure). The throttling device is arranged in the pipe between the condenser and the evaporator 1000, and the water collecting device 600 is arranged below the evaporator 1000. The medium-temperature and high-pressure refrigerant flowing out of the refrigerant outlet of the condenser first flows through the throttling device for throttling pressure drop before flowing into the refrigerant inlet of the evaporator 1000, thereby reducing the flow rate of the refrigerant, reducing the load of the air-conditioning system, and protecting the normal operation of the air-conditioning equipment. The water collecting device 600 is arranged below the evaporator 1000. In the air-conditioning system, the evaporator continuously absorbs heat, which reduces the surface temperature of the refrigerant pipe, condenses the moisture in the air, and frosts on the surface of the refrigerant pipe, which continues to thicken. For example, under heating conditions, the evaporator of the outdoor unit will frost, and the air-conditioning system needs to run the defrost mode at regular intervals to make the evaporator of the outdoor unit heat up for defrosting. The water collection device 600 is used to collect condensed water produced by the melting of frost when the air-conditioning system is defrosted, to prevent the condensed water from accumulating in the refrigerant pipe and being unable to be discharged in time, thereby affecting the energy efficiency of the air-conditioning system. Since the water receiving pan is arranged below the evaporator 1000, the water shielding edge of the water receiving pan may block the flow path of part of the evaporator 1000, so that the heat exchange efficiency and heat exchange effect of the blocked flow path in the part will be deteriorated. In the embodiment of the present application, a heating component 300 is arranged at the bottom of the evaporator 1000, and the heating component 300 is arranged at the outlet of the second refrigerant pipe 200. The outlet 220 of the second refrigerant pipe is lower than the inlet 110 of the first refrigerant pipe, that is, the refrigerant inlet of the evaporator 1000, so that the refrigerant inlet of the evaporator 1000 is raised, and the heat exchange effect at the evaporator inlet is improved. Through the cooperation between the heating component 300 and the second refrigerant pipe 200, the refrigerant heat exchange at the evaporator outlet is more sufficient, which is conducive to solving the problem of poor heat exchange effect at the bottom of the evaporator, further improving the heat exchange effect of the evaporator 1000, and at the same time reducing the liquid refrigerant at the outlet of the evaporator 1000, avoiding liquid hammer in the refrigerant pipe, and improving the safety and reliability of the air-conditioning system.

[0060] It should be noted that in one embodiment of the present application, the water collecting device 600 is one or more of a water receiving tray, an expansion water tank, a water collector, and a water distributor. Personnel in this field can select a suitable water collecting device 600 according to actual conditions. The embodiment of the present application does not limit the type of the water collecting device 600.

[0061] It should be noted that in one embodiment of the present application, the throttling component is an electronic expansion valve, and can also be one or more of a thermal expansion valve, a manual expansion valve and a capillary tube. The embodiment of the present application does not limit the type of the throttling component.

[0062] Reference Figure 5 , Figure 5It is a flow chart of a control method for an air-conditioning system provided by an embodiment of the present application, the air-conditioning system includes a condenser, a third refrigerant pipeline, an evaporator, a compressor, a throttling component, a first temperature detection module and a second temperature detection module; wherein the third refrigerant pipeline connects the refrigerant outlet of the condenser and the inlet of the first refrigerant pipeline; the evaporator includes a first refrigerant pipeline, a second refrigerant pipeline and a heating component, the inlet of the first refrigerant pipeline serves as the refrigerant inlet of the evaporator, and the inlet of the first refrigerant pipeline is lower than the outlet of the first refrigerant pipeline; the second refrigerant pipeline, the inlet of the second refrigerant pipeline is connected to the outlet of the first refrigerant pipeline, and the outlet of the second refrigerant pipeline serves as the refrigerant outlet of the evaporator; the heating component is arranged at the outlet of the second refrigerant pipeline, the heating component includes a first pipeline, the inlet of the first pipeline is connected to the refrigerant outlet of the condenser, and the outlet of the first pipeline is connected to the inlet of the first refrigerant pipeline; the third refrigerant pipeline includes at least one first pipeline and one second pipeline, the first pipeline and the second pipeline are connected in parallel, and a valve component is arranged in the first pipeline, and the valve component is used to control the conduction or disconnection of the first pipeline according to the heat exchange effect of the evaporator.

[0063] The exhaust port of the compressor is connected to the refrigerant inlet of the condenser, the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator through a throttling assembly, the refrigerant outlet of the evaporator is connected to the return air port of the compressor, a first temperature detection module is arranged at the refrigerant inlet of the evaporator for detecting the refrigerant temperature at the refrigerant inlet of the evaporator, and a second temperature detection module is arranged at the refrigerant outlet of the evaporator for detecting the refrigerant temperature at the refrigerant outlet of the evaporator. The control method of the air conditioning system includes steps S100 to S200, specifically,

[0064] S100: starting the air conditioning system and determining that the air conditioning system enters a stable state;

[0065] S200: When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is less than a preset temperature threshold, the first pipeline is controlled to be conductive.

[0066] When the air conditioning system is started, the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor and enters the condenser for cooling. The cooled refrigerant flows into the refrigerant inlet of the evaporator for heat exchange after the pressure drop is throttled by the throttling component. The refrigerant returns to the return air port of the compressor from the refrigerant outlet of the evaporator to complete the refrigeration function. When the air conditioning system is running, it is confirmed that the air conditioning system has entered a stable state, and the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is determined. When the temperature difference is less than the preset temperature threshold, it indicates that the current heat exchange efficiency of the evaporator is low, the control valve component is opened, the first pipeline is turned on, and the refrigerant flowing out of the refrigerant outlet of the condenser flows through the first pipeline and the second pipeline at the same time. The refrigerant flowing through the first pipeline and the second refrigerant pipeline perform heat exchange, and the gas-liquid mixed refrigerant in the second refrigerant pipeline absorbs heat, the superheat is increased, and the subcooling degree of the liquid refrigerant in the first pipeline is increased, which improves the heat exchange efficiency and the energy efficiency of the air conditioning system.

[0067] It should be noted that in the embodiment of the present application, the preset temperature threshold is 2°C to 3°C. Technical personnel in this field can set it according to different working conditions of the air-conditioning system. The embodiment of the present application does not limit the size of the preset temperature threshold.

[0068] Reference Figure 6 , Figure 6 : is a flow chart of a method for determining that an air conditioning system enters a stable state provided by an embodiment of the present application, including steps S110 and S120. Specifically,

[0069] S110: Periodically detecting the frequency of the compressor and the opening of the throttling component;

[0070] S120: When the frequencies of the compressors and the openings of the throttling components detected in a plurality of consecutive cycles are the same, it is determined that the air conditioning system has entered a stable state.

[0071] The method for determining whether an air-conditioning system has entered a stable state includes starting the air-conditioning system, and periodically detecting the frequency of the compressor and the opening of the throttling component after the compressor starts running for a first preset time. When the compressor frequency and the opening of the throttling component obtained by multiple consecutive period detections are the same, it is confirmed that the air-conditioning system has entered a stable state.

[0072] It should be noted that in the embodiment of the present application, the first preset time is 20 minutes to 25 minutes. The first preset time can be set according to different working conditions of the air-conditioning system. The embodiment of the present application does not limit the size of the first preset time.

[0073] It should be noted that in the embodiment of the present application, the periodic detection of the frequency of the compressor and the opening of the throttling component can be performed once every 3 minutes, or once every 5 minutes. The cycle can be set according to different working conditions of the air-conditioning system, and the embodiment of the present application does not limit the size of the cycle.

[0074] In one embodiment of the present application, when the frequencies of the compressors detected in a plurality of consecutive cycles are the same and the openings of the throttling components are the same, it is determined that the air conditioning system has entered a stable state, and it is determined whether the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is less than a preset temperature threshold, and the corresponding valve component switching action is performed according to the determination result. By determining the difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet after determining that the air conditioning system has entered a stable state, the accuracy and reliability of determining the heat exchange efficiency and heat exchange effect of the evaporator can be improved.

[0075] Reference Figure 7 , Figure 7 Another air conditioning system control method provided by an embodiment of the present application includes steps S100 and S300. Specifically,

[0076] S100: starting the air conditioning system and determining that the air conditioning system enters a stable state;

[0077] S300: When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is greater than a preset temperature threshold, the first pipeline is controlled to be disconnected.

[0078] Start the air-conditioning system. After confirming that the air-conditioning system has entered a stable state, determine the difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator. When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is greater than the preset temperature threshold, it proves that the current evaporator has a high heat exchange efficiency and a good heat exchange effect. At this time, the control valve assembly is closed and the first pipeline is disconnected, so that the refrigerant flowing out of the refrigerant outlet of the condenser only flows through the second pipeline, enters the refrigerant inlet of the evaporator through the second pipeline for heat exchange, and then returns to the return air port of the compressor from the refrigerant outlet of the evaporator to complete the refrigeration function.

[0079] Reference Figure 8 , Figure 8 A method for controlling the conduction or disconnection of a first pipeline provided in an embodiment of the present application includes steps S400 to S700. Specifically,

[0080] S400: starting the air conditioning system and confirming that the air conditioning system enters a stable state;

[0081] S500: Determine whether a temperature difference between a temperature of a refrigerant inlet of the evaporator and a temperature of a refrigerant outlet of the evaporator is less than a preset temperature threshold;

[0082] S600: When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is less than a preset temperature threshold, controlling the first pipeline to be turned on and to maintain the turned-on state for a second preset time;

[0083] S700: When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is greater than a preset temperature threshold, the first pipeline is controlled to be disconnected and maintained in the disconnected state for a third preset time.

[0084] In one embodiment of the present application, after the air-conditioning system enters a stable state, the refrigerant temperature at the refrigerant inlet of the evaporator and the refrigerant temperature at the refrigerant outlet of the evaporator are detected, and when the detection result indicates that the temperature difference between the temperature at the refrigerant inlet and the temperature at the refrigerant outlet is less than a preset temperature threshold, the valve assembly is controlled to open so that the first pipeline is turned on and remains in the turned-on state for a second preset time; when the detection result indicates that the temperature difference between the refrigerant temperature at the refrigerant inlet and the refrigerant outlet is greater than the preset temperature threshold, the valve assembly is controlled to close so that the first pipeline is disconnected and remains in the disconnected state for a third preset time.

[0085] It should be noted that in the embodiment of the present application, the second preset time is 20 minutes to 30 minutes. The second preset time can be set according to the working conditions of the air-conditioning system. The embodiment of the present application does not limit the size of the second preset time.

[0086] It should be noted that, in the embodiment of the present application, the third preset time is 20 minutes to 30 minutes. The third preset time can be set according to the working conditions of the air-conditioning system. The embodiment of the present application does not limit the size of the third preset time.

[0087] Reference Fig. 9 , Fig. 9It is a structural diagram of a controller 2000 provided in an embodiment of the present application, including a processor 2001, which can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement a control method for an air-conditioning system provided in an embodiment of the present application; a memory 2002, which can be implemented in the form of a read-only memory 2002 (Read Only Memory, ROM), a static storage device, a dynamic storage device or a random access memory 2002 (Random Access Memory, RAM) and the like. The memory 2002 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 2002 and are called by the processor 2001 to execute the embodiments of this application; the input / output interface 2003 is used to implement information input and output; the communication interface 2004 is used to implement communication interaction between this device and other devices, and communication can be achieved through wired methods (such as USB, network cables, etc.) or wireless methods (such as mobile networks, WIFI, Bluetooth, etc.); a bus transmits information between various components of the device (such as the processor 2001, the memory 2002, the input / output interface 2003 and the communication interface 2004); wherein the processor 2001, the memory 2002, the input / output interface 2003 and the communication interface 2004 are connected to each other within the device through the bus.

[0088] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer-readable storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0089] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. An evaporator of an air conditioning system, characterized in that: include: a first refrigerant pipeline, wherein an inlet of the first refrigerant pipeline serves as a refrigerant inlet of the evaporator, and the inlet of the first refrigerant pipeline is lower than an outlet of the first refrigerant pipeline; a second refrigerant pipe, wherein the inlet of the second refrigerant pipe is connected to the outlet of the first refrigerant pipe, the outlet of the second refrigerant pipe serves as the refrigerant outlet of the evaporator, and the outlet of the second refrigerant pipe is lower than the inlet of the first refrigerant pipe; A heating component is arranged at the outlet of the second refrigerant pipeline.

2. The evaporator of the air conditioning system according to claim 1, characterized in that: The heating component includes a first pipeline, the inlet of the first pipeline is connected to the refrigerant outlet of the condenser, and the outlet of the first pipeline is connected to the inlet of the first refrigerant pipeline.

3. The evaporator of the air conditioning system according to claim 2, characterized in that: The position of the second refrigerant pipeline is higher than that of the first pipeline, and the outlet of the second refrigerant pipeline is arranged adjacent to the first pipeline.

4. An air conditioning system, comprising a condenser, an evaporator according to any one of claims 2 to 3, and a third refrigerant pipeline, wherein the third refrigerant pipeline connects the refrigerant outlet of the condenser and the inlet of the first refrigerant pipeline, characterized in that: The third refrigerant pipeline includes at least one of the first pipelines and one of the second pipelines, and the second pipeline is connected in parallel with the first pipeline.

5. A control method for an air conditioning system, applied to the air conditioning system according to claim 4, characterized in that: include: Starting the air conditioning system and determining that the air conditioning system enters a stable state; When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is less than a preset temperature threshold, the first pipeline is controlled to be conductive.

6. The control method of the air conditioning system according to claim 5, characterized in that: The air conditioning system further comprises a compressor and a throttling assembly, wherein the outlet of the compressor is connected to the refrigerant inlet of the evaporator through the throttling assembly, and the refrigerant outlet of the evaporator is connected to the return air port of the compressor; The step of determining that the air conditioning system enters a stable state includes: Periodically detecting the frequency of the compressor and the opening of the throttling component; When the frequencies of the compressors and the openings of the throttling components detected in a plurality of consecutive cycles are the same, it is determined that the air-conditioning system has entered a stable state.

7. The control method of the air conditioning system according to claim 6, characterized in that: The control method further comprises: When the temperature difference between the temperature of the refrigerant inlet of the evaporator and the temperature of the refrigerant outlet of the evaporator is greater than the preset temperature threshold, the first pipeline is controlled to be disconnected.

8. The control method of the air conditioning system according to claim 7, characterized in that: The control method further comprises: After controlling the first pipeline to be turned on, maintaining the turned-on state for a second preset time; or, After controlling the first pipeline to be disconnected, the disconnected state is maintained for a third preset time.

9. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method for the air conditioning system as claimed in any one of claims 5 to 8 when executing the computer program.

10. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the control method of the air-conditioning system according to any one of claims 5 to 8.

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